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* ctdb-logging: Split ringbuffer handling code from ctdb_collect_logAmitay Isaacs2014-06-121-0/+2
| | | | | Signed-off-by: Amitay Isaacs <amitay@gmail.com> Reviewed-by: Martin Schwenke <martin@meltin.net>
* ctdb-daemon: Rename ctdb_mkdir_p_or_die to mkdir_p_or_dieAmitay Isaacs2014-06-121-1/+1
| | | | | | | This function does not require ctdb context. Signed-off-by: Amitay Isaacs <amitay@gmail.com> Reviewed-by: Martin Schwenke <martin@meltin.net>
* ctdb-daemon: Rename ctdb_lockdown_memory to lockdown_memoryAmitay Isaacs2014-06-121-1/+1
| | | | | Signed-off-by: Amitay Isaacs <amitay@gmail.com> Reviewed-by: Martin Schwenke <martin@meltin.net>
* ctdb-daemon: Instead of passing ctdb context, pass valgrinding booleanAmitay Isaacs2014-06-121-1/+1
| | | | | Signed-off-by: Amitay Isaacs <amitay@gmail.com> Reviewed-by: Martin Schwenke <martin@meltin.net>
* ctdb-common: Remove unused functionsAmitay Isaacs2014-06-121-2/+0
| | | | | Signed-off-by: Amitay Isaacs <amitay@gmail.com> Reviewed-by: Martin Schwenke <martin@meltin.net>
* ctdb-common: Drop ctdb prefix from utility functions independent of ctdbAmitay Isaacs2014-06-121-2/+2
| | | | | Signed-off-by: Amitay Isaacs <amitay@gmail.com> Reviewed-by: Martin Schwenke <martin@meltin.net>
* ctdb-common: Changing scheduler policy does not require ctdb contextAmitay Isaacs2014-06-121-2/+2
| | | | | Signed-off-by: Amitay Isaacs <amitay@gmail.com> Reviewed-by: Martin Schwenke <martin@meltin.net>
* ctdb-common: No need to save previous scheduler priorityAmitay Isaacs2014-06-121-1/+0
| | | | | | | | When calling sched_setscheduler() with SCHED_OTHER, the only valid priority is 0. Nice value is "restored" anyway. Signed-off-by: Amitay Isaacs <amitay@gmail.com> Reviewed-by: Martin Schwenke <martin@meltin.net>
* ctdb-daemon: Add control CTDB_CONTROL_DB_DETACHAmitay Isaacs2014-04-141-0/+2
| | | | | | | This detaches specified database from all the nodes. Signed-off-by: Amitay Isaacs <amitay@gmail.com> Reviewed-by: Martin Schwenke <martin@meltin.net>
* ctdb-daemon: Always update database priority cluster wideAmitay Isaacs2014-04-071-1/+2
| | | | | | | | | | | | | Database priority is a global property and all the nodes should have the priority set for the databases. Just setting priority on one node can lead to problems in the recovery as a database can be frozen at wrong priority and then freezing database would not succeed. Signed-off-by: Amitay Isaacs <amitay@gmail.com> Reviewed-by: David Disseldorp <ddiss@samba.org> Autobuild-User(master): David Disseldorp <ddiss@samba.org> Autobuild-Date(master): Mon Apr 7 14:06:26 CEST 2014 on sn-devel-104
* ctdb/daemon: Make delete IP wait until the IP is releasedMartin Schwenke2014-03-231-1/+8
| | | | | | | | | | | | reloadips really expects deleted IPs to be released before completing. Otherwise the recovery daemon starts failing the local IP check. The races that follow can cause a node to be banned. To make the error handling simple, do the actual deletion in release_ip_callback(). Signed-off-by: Martin Schwenke <martin@meltin.net> Reviewed-by: Amitay Isaacs <amitay@gmail.com>
* ctdb-daemon: Do not run monitor event if any other event is already runningAmitay Isaacs2014-01-211-0/+1
| | | | | | | | | | | | Any currently running monitor events are cancelled if any other events are scheduled. However, this does not stop monitor events to be run when other events are already running. Keep track of the number of active events and schedule monitor event only if there are no active events. Signed-off-by: Amitay Isaacs <amitay@gmail.com> Reviewed-by: Martin Schwenke <martin@meltin.net>
* ctdb/daemon: Untangle serialisation of 1st recovery -> startup -> monitorMartin Schwenke2014-01-171-1/+1
| | | | | | | | | | | | | | At the moment ctdb_check_healthy() is overloaded to wait until the first recovery is complete, handle the "startup" event and also actually handle monitoring. This is untidy and hard to follow. Instead, have the daemon explicitly wait for 1st recovery after the "setup" event. When first recovery is complete, schedule a function to handle the "startup" event. When the "startup" event succeeds then explicitly enable monitoring. Signed-off-by: Martin Schwenke <martin@meltin.net> Reviewed-by: Amitay Isaacs <amitay@gmail.com>
* ctdb-daemon: Remove ctdb_fork_with_logging()Amitay Isaacs2014-01-161-5/+0
| | | | | | | | | | This function has been replaced with ctdb_vfork_with_logging(). Signed-off-by: Amitay Isaacs <amitay@gmail.com> Reviewed-by: Martin Schwenke <martin@meltin.net> Autobuild-User(master): Martin Schwenke <martins@samba.org> Autobuild-Date(master): Thu Jan 16 04:05:35 CET 2014 on sn-devel-104
* ctdb-daemon: Add ctdb_vfork_with_logging()Amitay Isaacs2014-01-161-0/+9
| | | | | | | | This will be used to spawn lightweight helper processes to run eventscripts. Signed-off-by: Amitay Isaacs <amitay@gmail.com> Reviewed-by: Martin Schwenke <martin@meltin.net>
* ctdb-daemon: No need to call event scripts with CTDB_CALLED_BY_USERAmitay Isaacs2014-01-161-2/+1
| | | | | | | | This was added to support external monitoring using CTDB event scripts. However, it was never used. Signed-off-by: Amitay Isaacs <amitay@gmail.com> Reviewed-by: Martin Schwenke <martin@meltin.net>
* ctdb-common: Refactor code to keep track of child processesAmitay Isaacs2013-11-271-0/+1
| | | | | | | This code can then be used to track child processes created with vfork(). Signed-off-by: Amitay Isaacs <amitay@gmail.com> Reviewed-by: Michael Adam <obnox@samba.org>
* ctdb-locking: Implement active lock requests limit per databaseAmitay Isaacs2013-11-271-1/+2
| | | | | | | | | | | | This limit was currently a global limit and not per database. This prevents any database freeze lock requests from getting scheduled if the global limit was reached. Only individual record requests should be limited and database freeze requests should always get scheduled. Signed-off-by: Amitay Isaacs <amitay@gmail.com> Reviewed-by: Michael Adam <obnox@samba.org>
* ctdb-recoverd: Fix backward compatibility for CTDB_SRVID_TAKEOVER_RUNMartin Schwenke2013-11-271-1/+6
| | | | | | | | | When running a mixed version cluster, compatibility with older versions was was broken during recent refactorisation. Signed-off-by: Martin Schwenke <martin@meltin.net> Pair-programmed-with: Amitay Isaacs <amitay@gmail.com> Reviewed-by: Michael Adam <obnox@samba.org>
* tunables: Remove obsolete tunablesAmitay Isaacs2013-10-301-3/+0
| | | | | | Signed-off-by: Amitay Isaacs <amitay@gmail.com> (This used to be ctdb commit ca5fc3431573c44d55d09d987c715fb53756fc1f)
* common: New function ctdb_mkdir_p_or_die()Martin Schwenke2013-10-251-0/+1
| | | | | | Signed-off-by: Martin Schwenke <martin@meltin.net> (This used to be ctdb commit 7b971df79b0b63f83555205eacf48d49ca3a273a)
* common: New function mkdir_p()Martin Schwenke2013-10-251-0/+2
| | | | | | | | | Behaves like mkdir -p. Signed-off-by: Martin Schwenke <martin@meltin.net> Pair-programmed-with: Amitay Isaacs <amitay@gmail.com> (This used to be ctdb commit afe2145d91725daf1399f0a24f1cddcf65f0ec31)
* ctdbd: Pass the public address file location in ctdb contextMartin Schwenke2013-10-221-2/+1
| | | | | | | | | | No need to pass it as an extra argument to ctdb_start_daemon. Also ensure options.public_address_list gets a nice static default. Signed-off-by: Martin Schwenke <martin@meltin.net> (This used to be ctdb commit a3d63a9db89d08bb284b3b3a6db773422f21b477)
* ctdbd: Default for event_script_dir should use CTDB_BASEMartin Schwenke2013-10-221-1/+0
| | | | | | | | | | Also get rid of ctdb_set_event_script_dir(). It creates an unnecessary copy of something that will be around for the lifetime of the process. Signed-off-by: Martin Schwenke <martin@meltin.net> (This used to be ctdb commit 21b4d1aba00902f1eee0cbf4f082b0794fd5b738)
* ctdbd: Add nodes_file member to struct ctdb_contextMartin Schwenke2013-10-221-0/+1
| | | | | | | | | | | | | | | | | This allows ctdb_load_nodes_file() to move to ctdb_server.c and ctdb_set_nlist() to become static. Setting ctdb->nodes_file needs to be done early, before the nodes file is loaded. It is now set from CTDB_BASE instead ETCDIR, so setting CTDB_BASE also needs to be done earlier. Unhack ctdbd_test.c - it no longer needs to define ctdb_load_nodes_file(). Signed-off-by: Martin Schwenke <martin@meltin.net> Pair-programmed-with: Amitay Isaacs <amitay@gmail.com> (This used to be ctdb commit 20e705e63bd3b20837cc3ac92fdcf2a9650ccfc8)
* ctdbd: Remove transaction code related to TRANS2 commitsAmitay Isaacs2013-10-041-1/+0
| | | | | | | | | This removes data types and structure elements related to TRANS2 persistent transaction code. Signed-off-by: Amitay Isaacs <amitay@gmail.com> (This used to be ctdb commit 22a253b7ccf1ff854cddf0b67969dc84d7d6a654)
* include: Remove unused set_dmaster structureAmitay Isaacs2013-10-041-6/+0
| | | | | | Signed-off-by: Amitay Isaacs <amitay@gmail.com> (This used to be ctdb commit 2ce3a48cc969d563c26dd295723416c0d7b077a2)
* recoverd: Fix the implementation of CTDB_SRVID_REBALANCE_NODEMartin Schwenke2013-09-191-2/+3
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | The current implementation has a few flaws: * A takeover run is called unconditionally when the timer goes even if the recovery master role has moved. This means a node other than the recovery master can incorrectly do a takeover run. * The rebalancing target nodes are cleared in the setup for a takeover run, regardless of whether the takeover run succeeds. * The timer to force a rebalance isn't cleared if another takeover run occurs before the deadline. Any forced rebalancing will happen in the first takeover run and when the timer expires some time later then an unnecessary takeover run will occur. * If the recovery master role moves then the rebalancing data will stay on the original node and affect the next takeover run to occur if the recovery master role should come back to the original node. Instead, store an array of rebalance target nodes in the recovery master context. This is passed as an extra argument to ctdb_takeover_run() each time it is called and is cleared when a takeover run succeeds. The timer hangs off the array of rebalance target nodes, which is cleared if the node isn't the recovery master. This means that it is possible to lose rebalance data if the recovery master role moves. However, that's a difficult problem to solve. The best way of approaching it is probably to try to stop the recovery master role from jumping around unnecesarily when inactive nodes join the cluster. The long term solution is to avoid this nonsense completely. The IP allocation algorithm needs to cache state between runs so that it knows which nodes have just become healthy. This also needs recovery master stability. Signed-off-by: Martin Schwenke <martin@meltin.net> (This used to be ctdb commit c51c1efe5fc7fa668597f2acd435dee16e410fc9)
* recoverd: Make the SRVID request structure genericMartin Schwenke2013-09-191-10/+3
| | | | | | | | No need for a separate one for each SRVID. Signed-off-by: Martin Schwenke <martin@meltin.net> (This used to be ctdb commit d9c22b04d5aa7938a3965bd3144568664eb772ce)
* recoverd: Move struct ctdb_public_ip_list back into ctdb_takeover.cMartin Schwenke2013-08-221-6/+0
| | | | | | | | | | This is an internal structure. It was moved into ctdb_private.h a long time ago to allow unit testing. Unit test compilation was changed shortly afterwards to make this unnecessary. Signed-off-by: Martin Schwenke <martin@meltin.net> (This used to be ctdb commit db57261d7dc264e161659a8c547f44fbd9e88eeb)
* Revert "LACOUNT: Add back lacount mechanism to defer migrating a ↵Amitay Isaacs2013-08-221-2/+1
| | | | | | | | | | | | | | | | | | | fetched/read copy until after default of 20 consecutive requests from the same node" This reverts commit 035c0d981bde8c0eee8b3f24ba8e2dc817e5b504. This is a premature optimization. Record can bounce between nodes very quickly if it is a contended record. There is no need to hold a record on a node unnecessarily. In case record contention becomes bad, enabling sticky records on a database is a better idea. Conflicts: include/ctdb_private.h server/ctdb_tunables.c Signed-off-by: Amitay Isaacs <amitay@gmail.com> (This used to be ctdb commit ac417b0003f0116f116834ad2ac51482d25cfa0d)
* Revert "ctdbd: Remove incomplete ctdb_db_statistics_wire structure"Amitay Isaacs2013-07-291-0/+4
| | | | | | | | | | | The structure cannot be removed without adding support for marshalling keys for hot records. This reverts commit 26a4653df594d351ca0dc1bd5f5b2f5b0eb0a9a5. Signed-off-by: Amitay Isaacs <amitay@gmail.com> (This used to be ctdb commit 023ca2e84f5ed064a288526b9c2bc7e06674dd81)
* common/system: Add ctdb_set_process_name() functionAmitay Isaacs2013-07-101-0/+1
| | | | | | Signed-off-by: Amitay Isaacs <amitay@gmail.com> (This used to be ctdb commit fc3689c977f48d7988eed0654fb8e5ce4b8bfc8b)
* ctdbd: No need for DeadlockTimeout tunableAmitay Isaacs2013-07-101-1/+0
| | | | | | | | | The code for deadlock detection and killing smbd process causing deadlock has been removed and replaced with external debug script. Signed-off-by: Amitay Isaacs <amitay@gmail.com> (This used to be ctdb commit 2211cd94bea266547d3e6f167d3160a6b23bec88)
* ctdbd: Remove incomplete ctdb_db_statistics_wire structureAmitay Isaacs2013-07-101-4/+0
| | | | | | | | | | Send the ctdb_db_statistics directly instead of first copying it to duplicate ctdb_db_statistics_wire structure. This simplifies the implementation of the control to get database statistics. Signed-off-by: Amitay Isaacs <amitay@gmail.com> (This used to be ctdb commit 26a4653df594d351ca0dc1bd5f5b2f5b0eb0a9a5)
* recoverd: Clean up log messages in remote IP verificationMartin Schwenke2013-07-051-1/+2
| | | | | | | | | | | | | | | The log messages in verify_remote_ip_allocation() are confusing because they don't include the PNN of the problem node, because it is not known in this function. Add the PNN of the node being verified as a function argument and then shuffle the log messages around to make them clearer. Also fold 3 nested if statements into just one. Signed-off-by: Martin Schwenke <martin@meltin.net> (This used to be ctdb commit f0942fa01cd422133fc9398f56b4855397d7bc86)
* util: New function ctdb_die()Martin Schwenke2013-07-051-0/+1
| | | | | | | | | This is like ctdb_fatal() but exits cleanly without dumping core or generating a backtrace. Signed-off-by: Martin Schwenke <martin@meltin.net> (This used to be ctdb commit c0a9456692c88a7a5542cd893d8f326524d3f94e)
* banning: Make ctdb_local_node_got_banned() a void functionAmitay Isaacs2013-07-021-1/+1
| | | | | | | | When this function is called, we are already committed to banning and there is no point in failing this function. In case, freezing of databases fails, it will be fixed from recovery daemon. (This used to be ctdb commit bb178338658b4ae32382a1f62f7c21cee1d4878f)
* freeze: Make ctdb_start_freeze() a void functionAmitay Isaacs2013-07-021-1/+1
| | | | | | | | | If this function fails due to memory errors, there is no way to recover. The best course of action is to abort. Signed-off-by: Amitay Isaacs <amitay@gmail.com> (This used to be ctdb commit 46efe7a886f8c4c56f19536adc98a73c22db906a)
* ctdbd: Refactor shutdown sequenceMartin Schwenke2013-06-221-0/+2
| | | | | | Signed-off-by: Martin Schwenke <martin@meltin.net> (This used to be ctdb commit b32fd04bfbf33062d45365b37a7247e272a76ceb)
* ctdbd: Add new runstate CTDB_RUNSTATE_FIRST_RECOVERYMartin Schwenke2013-05-241-0/+1
| | | | | | | | | | | | | | This adds more serialisation to the startup, ensuring that the "startup" event runs after everything to do with the first recovery (including the "recovered" event). Given that it now takes longer to get to the "startup" state, the initscript needs to wait until ctdbd gets to "first_recovery". Signed-off-by: Martin Schwenke <martin@meltin.net> Pair-programmed-with: Amitay Isaacs <amitay@gmail.com> (This used to be ctdb commit ed6814ff0a59ddbb1c1b3128b505380f60d7aeb7)
* ctdbd: Replace ctdb->done_startup with ctdb->runstateMartin Schwenke2013-05-241-1/+14
| | | | | | | | | | | | | | This allows states, including startup and shutdown states, to be clearly tracked. This doesn't include regular runtime "states", which are handled by node flags. Introduce new functions ctdb_set_runstate(), runstate_to_string() and runstate_from_string(). Signed-off-by: Martin Schwenke <martin@meltin.net> Pair-programmed-with: Amitay Isaacs <amitay@gmail.com> (This used to be ctdb commit 8076773a9924dcf8aff16f7d96b2b9ac383ecc28)
* locking: Remove functions that are not used anymoreAmitay Isaacs2013-05-241-2/+0
| | | | | | | | | These functions were used in locking child process to do the locking. With locking helper, these are not required. Signed-off-by: Amitay Isaacs <amitay@gmail.com> (This used to be ctdb commit c660f33c3eaa1b4a2c4e951c1982979e57374ed4)
* recoverd: Fix tunable NoIPTakeoverOnDisabled, rename to NoIPHostOnAllDisabledMartin Schwenke2013-05-071-1/+1
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | This really needs to be per-node. The rename is because nodes with this tunable switched on should drop IPs if they become unhealthy (or disabled in some other way). * Add new flag NODE_FLAGS_NOIPHOST, only used in recovery daemon. * Enhance set_ipflags_internal() and set_ipflags() to setup NODE_FLAGS_NOIPHOST depending on setting of NoIPHostOnAllDisabled and/or whether nodes are disabled/inactive. * Replace can_node_servce_ip() with functions can_node_host_ip() and can_node_takeover_ip(). These functions are the only ones that need to look at NODE_FLAGS_NOIPTAKEOVER and NODE_FLAGS_NOIPHOST. They can make the decision without looking at any other flags due to previous setup. * Remove explicit flag checking in IP allocation functions (including unassign_unsuitable_ips()) and just call can_node_host_ip() and can_node_takeover_ip() as appropriate. * Update test code to handle CTDB_SET_NoIPHostOnAllDisabled. Signed-off-by: Martin Schwenke <martin@meltin.net> Pair-programmed-with: Amitay Isaacs <amitay@gmail.com> (This used to be ctdb commit 1308a51f73f2e29ba4dbebb6111d9309a89732cc)
* ctdbd: Remove the "stopped" eventMartin Schwenke2013-05-061-1/+1
| | | | | | | | It isn't used, superceded by "ipreallocated". Signed-off-by: Martin Schwenke <martin@meltin.net> (This used to be ctdb commit c2bb8596a8af6406ef50e53953884df9d6246a96)
* ctdbd: New control CTDB_CONTROL_IPREALLOCATEDMartin Schwenke2013-05-061-0/+3
| | | | | | | | | This is an alternative to using ctdb_run_eventscripts() that can be used when in recovery. Signed-off-by: Martin Schwenke <martin@meltin.net> (This used to be ctdb commit 27a44685f0d7a88804b61a1542bb42adc8f88cb1)
* vacuum: introduce the RECEIVE_RECORDS controlMichael Adam2013-04-241-0/+1
| | | | | | | | | | | | | | | | | This in preparation of turning the vacuming on the lmaster into into a two phase process: - First the node sends the list of records to be vacuumed to all other nodes with this new RECEIVE_RECORDS control. The remote nodes should store the lmaster's empty current copy. - Only those records that could be stored on all other nodes are processed further. They are send to all other nodes with the TRY_DELETE_RECORDS control as before for deletion. Signed-off-by: Michael Adam <obnox@samba.org> Reviewed-By: Amitay Isaacs <amitay@gmail.com> (This used to be ctdb commit e397702e271af38204fd99733bbeba7c1db3a999)
* util: Removed unused declaration of ctdbd_start()Martin Schwenke2013-04-181-1/+0
| | | | | | | Signed-off-by: Martin Schwenke <martin@meltin.net> Reviewed-by: Michael Adam <obnox@samba.org> (This used to be ctdb commit 1e989894764e4cd1d551c44784d91cb295cd790d)
* include: Move ctdb_start_daemon() from ctdb_client.h to ctdb_private.hMartin Schwenke2013-04-181-0/+3
| | | | | | | | | | It really is internal. Signed-off-by: Martin Schwenke <martin@meltin.net> Pair-programmed-with: Amitay Isaacs <amitay@gmail.com> Reviewed-by: Michael Adam <obnox@samba.org> (This used to be ctdb commit abb64f62efaa70df4b87c030b96300eafd98e6a3)
* ctdbd: Add --pidfile optionMartin Schwenke2013-04-181-0/+1
| | | | | | | | | | Default is not to create a pid file. Signed-off-by: Martin Schwenke <martin@meltin.net> Pair-programmed-with: Amitay Isaacs <amitay@gmail.com> Reviewed-by: Michael Adam <obnox@samba.org> (This used to be ctdb commit 996e74d3db0c50f91b320af8ab7c43ea6b1136af)
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